论文部分内容阅读
北京——武汉——广州通信干线,全长2800km,是我国通信网中的中轴线,有人称为干线中的干线。它对于我国大部分地区通信能否畅通,起着举足轻重的作用。目前,广州到北京的长途电话,忙时溢出率达90%以上,电话接通率仅1%～2%。为了迅速缓解京汉广一级中心间以及省际间通信严重紧张状况,邮电部决定在不放慢京汉广直埋光缆工程建设进度的同时,利用京汉广明线杆路建设京汉广架空光缆工程。采用12芯单模光缆,建成五主一备140Mbit/s系统。
Beijing - Wuhan - Guangzhou communications trunk, a total length of 2800km, China’s communications network in the axis, it was called the main trunk line. It plays a decisive role in the smooth flow of communications in most parts of our country. At present, the long-distance phone number from Guangzhou to Beijing is over 90% when busy, and the phone connection rate is only 1% -2%. In order to quickly ease the serious tension between the Beijing-Hankou centers as well as the inter-provincial communications, the Ministry of Posts and Telecommunications decided not to slow down the progress of construction of the Guanghan Optical Fiber Buried Optical Fiber Cable Project and at the same time, Optical cable project. The use of 12-core single-mode fiber optic cable, built five main a 140Mbit / s system.